n. A blue discolouration of the skin due to the circulation of blood low in oxygen.
the GNU version of the Collaborative International Dictionary of English
n. A condition in which, from insufficient aëration of the blood, the surface of the body becomes blue. See cyanopathy.
The Century Dictionary and Cyclopedia
n. In pathology, a blue or more or less livid color of the surface of the body, due to imperfect circulation and oxygenation of the blood; the blue jaundice of the ancients.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a bluish discoloration of the skin and mucous membranes; a sign that oxygen in the blood is dangerously diminished (as in carbon monoxide poisoning)
Word Usage
"With too much deoxygenated blood in the arteries, the skin turns from pink to blue (cyanosis comes from the Greek kyanos, meaning dark blue)."